e-journal

Raman scattering study of the thermal conversion of bundled carbon nanotubes into graphitic nanoribbons

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Abstract.
Raman scattering is used to study the temperature-driven structural transformations of
bundled single-walled carbon nanotubes (SWCNTs) observed in HiPCO and ARC synthesis
by electron microscopy, i.e., tube–tube coalescence 1300–1400 oC, coalesced tubes to
multi-walled tubes (MWCNT) at 1600–1800 oC and finally (only ARC tubes) MWCNT to graphitic
nanoribbons (GNRs) at 1800 C. All these transformations occurred in vacuum.
Here, we present the details of these transformations as seen through the ‘‘eyes’’ of Raman
scattering via changes in the radial (R) SWCNT band, the G-band (and its substructure) and
the relative intensity of the disorder-induced D- and D0-band scattering. The Raman spectrum
of GNRs is also discussed in detail. For 514.5 nm laser excitation, five relatively broad
GNR Raman bands are observed: 1350, 1580, 1620, 2702 and 3250 cm-1. A Knight plot is used
to estimate the GNR width and we find w - 9 nm, which is in reasonable agreement with
the estimate of 7.6 nm based on TEM and the model that a GNR is a collapsed MWCNT.

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Ketersediaan

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Informasi Detail

Judul Seri

C A R B ON

No. Panggil

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Penerbit

London : Elsevier Ltd.., 2008

Deskripsi Fisik

C A R B ON 4 6 ( 2 0 0 8 ) 7 2 9 –7 4 0

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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